Double-cylinder planer



March 11, 1930. w, HALL 1,749,938

DOUBLE CYLINDER PLANER Filed Feb. 23, 1926 4 Sheets-Sheet l W. H. HALLDOUBLE CYLINDER PLANER March 11, 1930.

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MASSACHUSETTS, ASSIGNOR T GOODSPEED MA- CHINE COMPANY, OF WINCHENDON,MASSACHUSETTS, A CORPORATION OF MASSA- CHUSETTS DOUBLE-CYLINDER PLANERApplication filed February 23, 1926. Serial No. 89,834.

This invention relates to a-wood planer of the double cylinder type inwhich a separate electric motor is provided for each of the twocylinders. In such planers, it is necessary to and lowering one of thecylinders with the work table for different sizes of work, and it isalso sometimes necessary to adjust the lower cylinder rela-' tively tothe Work table to vary the thickness of cut, and also to slightly adjustthe cylinder angularly in a vertical plane to produce an even thicknessin the finished stock throughout its width.

It is one object of my invention to provide an improved construction forsupporting and adjusting the motor for the lower cylinder, so that themotor may be conveniently aligned with the cylinder in any operativeposition thereof. I have also provided improved means for adjusting thecylinder angularly, and an improved presser bar construction by whichthe work is supported as it passes from the revolving cutter.

My invention further relates to arrangements and combinations of partswhich will be hereinafter described and more particularly pointed out inthe appended claims.

A preferred form of the invention is shown in the drawings in which Fig.1 is aplan view of a portion of my improved planer; v

Fig. 2 is a front elevation, looking in the direction of the arrow 2 inFig. 1;

Figs. 3 and '4 are partial side elevations, looking in the directions ofthe arrows 3 and 4respectively inFig. 2; I

Fig. 5 is a plan view of my improved presser bar, looking in thedirection of th'c arrow 5 in Fig. 4;

Fig. 6 is a side elevation of the presser bar, partly in section, andlooking in the direction of the arrow 6 in Fig. 5;

Fig. 7 is an end view of the presser bar, looking .in the direction ofthe arrow 7 in Fig. 5; and I Fig. 8 is a similar view with certain partsomitted. I

Referring to the drawings, I have shown a base or frame 10 in which atable frame 11 (Fig. 4) is slidable vertically by means of a pair ofoperating wedges 12. Power actuated means (not shown) is commonlyprovided for moving the wedges 12 to raise or lower the table frame 11.The base or frame 10 is extended upwardly table, as indicated at 13 inFigs. 3 and 4, and supports the upper presser rolls l4 and also theupper cylinder and knives (not shown), together with the motor fordriving the same. All of these parts are of the usual construction andin themselves form no part of my present invention.

The lower cylinder 15, which carries the knives 16, (Fig. 4) issupported in suitable bearings 17 preferably of the anti-friction type,mounted on a plate or stand 18 which is slidable in guide-ways 19 in acylinder base 20. At its left hand end as viewed in Fig. 2, the stand 18rests pivotally upon a cross bar 21 fixed to the cylinder base 20, andat its right hand end the stand 18 rests upon a wed e 22 (Fig. 4)supported on an inclined sur ace of the cylinder base 20 and adjustableto raise or lower the end of the cylinder stand 18 by means of nuts 23.

A clamping device 24 is provided for firmly retaining the stand 18 inthe guide-ways 19. When the clamping device 24 is loosened, the stand18, together with the cylinder and its bearings 17, may be removed as aunit from the planer for inspection or repairs. The cylinder base alsosupports a presser roll 25 mounted in yielding hearat each side of the'i ings 26, and a presser bar 27 to be described. The cylinder base 20is supported upon W wedges 28 (Fig. 4) slidable upon inclined surfaces29 of the table frame 11. Threaded shafts 30 (Figs. 3 and 4) areprovided for simultaneously moving the wedges 28 at the two sides of theplaner, and these shafts are provided with worm wheels 31 (Fig. 2)engaged by worms 32 on a worm shaft 33 which may be rotated manually bya hand wheel 34.

The cutter cylinder, together with its presser roll and presser bar, maythus be ad justed vertically relatively to the table frame 11 by manualmovement of the hand Wheel 34 and the cutter cylinder may be slightlycurely bolted to the table frame 11;

adjusted 'angularly relatively to the table frame by means of the wedge22;

The driving motor M (Fig. 2) for the lower cutter cylinder 15 is mountedon a bracket 35 which is vertically slidable in guide-ways 36 (Fig. 1)in a U-shaped stand or frame work 37 provided with feet 38 which are se-The frame or stand 37 is also provided withfa depending angle portion 40secured thereto and having a Vertical surface 41 slidable against theend of a bracket 42 rigidly secured to the base or frame 10 of'theplaner. As the table frame 11 is raised or lowered to accommodatedifierentsizes of stock, the angle 40 slides vertically relatively tothe bracket &2 but in every position it is adapted to assist in the firmsupport of the overhung weight of the motor M. Y

A screw 4 1 (Fig. 2) is rotatably mounted on a depending projection 45of the bracket.

37 and is held from axial movement relative thereto. The screw M isthreaded into the motor bracket 35 and provides means for convenientlyadjusting the motor vertically. The screw 44 is preferably provided witha bevel gear (Fig. 3) meshing with a bevel gear 17 on a shaft 48rotatable in a bearing 19 supported by the frame 37 and provided with ahand wheel 50 adjacent the hand wheel 34 previously described. The screw14: may be rotated by use of the hand wheel 50 to raise or lower themotor M.

The motor is preferably connected to the cutter cylinder by a detachableconnection comprising clutch members 51 and 52 (Fig. 2) which permit theparts to slide vertically relative to each other during the adjustmentof the cutter cylinder, 7

In the operation of the machine, the usual table wedges 12 (Fig. 1) areused for raising or lowering the table to adjust the machine fordifierent sizes of work. At occasional but infrequent intervals it maybe necessary to adjust the cutter cylinder slightly relatively to thetable, which adjustment may be 'easilv accomplished by means of the handwheel 31 acting through thesmall wedges 28.

After the cuttercylinder is thus adjusted, it is a very simple matter toslightly raise or lower the motor bring the two parts 51 and 52of theclutch into axial alignment, which may be reacily determined by touch,as the two parts of the clutch are of the same diameter.

If the cutter cylinder requires adjustment angularly tovary the depth ofcut at either edge of the work, this adjustment may be accomplished bymeans of the wedge 22 but this adjustment never amounts to more than afew thousandths of an inch and does not cause a perceptible change inalignmentbe tween the motor and the cutter cylinder. The motor M is atall times very firmly supported to vary the depth of cut,

M by the hand wheel 50 to by the bracket'or frame work 37 which issecured to the heavy table frame 11 at widely spaced parts. I

I will now describe my improved presser bar construction as best shownin Figs. 5 to 8. This presser bar 27 is designed to fit.

closely to the cutter cylinder 15 just clearing the knives 16 thereon.The particular function of the presser extreme rear end of piece ofstock as it passes from the'cutter cylinder, preventing the rear endfrom being depressed and receiving a deeper out than the remainingportion ofthe stock.

My improved presser bar consists of an areshaped or segmental bodyportion 56 (Fig. 8) extending across the machine parallel to the cuttercylinder 15 and provided with offset arms 57 at its 5) ma frame memberor stand 59. The stand 59has a connecting portion 60 (Fig.8) joining thetworends thereof andis also pro:

vided with outwardly projecting flanges 61 (Fig. 6) having inclinedlower surfaces rest: ing uponcorrespondinginclined surfaces 62 of adouble wedge member 63 slidable trans versely in gnide ways in thecylinder base 20.

An adjusting screw 64 is provided for moving the wedge 63 longitudinallyto raise or lower the presserbar 27, and bolts 65 are pro-- vided forclamping the flanges 61 of the frame 59 in adjusted positiomthe bolts 65through slots in the wedge member 63.

The arms 57 of the presser bar are provided with lugs or ears 66'through vwhich extend threaded studs 67 secured in the flange 61 of thesupport 59. Nuts 68 on thestuds 67 limit upward movement of thepresserbar relative to its support. The projections 61 are also providedwithpockets 70 ,to receive springs bar is to support the 7 ends, pivoted at58 (Fig.

extending 71 having buttons 7 2 fitted in theiropen ends and engaged byscrews 73 threaded in the lugs or ears 66. Y j

, The presser bar 27 is thus held yieldingly in the raised positionwhich is determined by the adjusting nuts 68, and the upward pressure ofthe bar may be regulated as deiie sired by means of the screw 7 3.. Ihave thus I provided a firm and rigid construction of presser bar whichis very easily adjustable as to height relatively to the connecting portion 60 of its support 59,"and which may also be adjusted bodily withsaid conneetingpon tion by means of the double wedge member I 63. Thetension of the presser bar is also convenlently adjusted by means of thescrews 73,

all of which constitute marked improvements over the previous practice.7

Having thus described my invention and the advantages thereof, I do notwish tobe limited to the details herein disclosed, otherwise than as setforth in the claims, but what I claim is 1 In a wood planer, a worktable, a cutter cylinder, a presser barfor said cylinder, a

ifs;

stand on which said bar is pivoted, means to press said bar yieldinglyupward in said stand, means to limit such upward move ment, and means toadjust said stand vertically relatively to said work table, said lattermeans comprising a double Wedge member slidable beneath said stand.

2. In a wood planer, a work table, a cutter cylinder, a presser barmounted in said table adjacent said cylinder, saidbar having a bodyportion with rearwardly extending offset arms at the rear thereof, apivot in the rear end of each arm, and pivot bearings carried by thetable for said arms, adjustable means beneath said bar and forwardly ofsaid arms to press said bar yieldingly upward, and means to adjust saidarms, bearings and pressing means vertically of said table. 3. In a woodplaner, a work table, a cutter cylinder, a presser bar for saidcylinder, a stand on which said bar is pivoted, adjustable means topress said bar yieldingly up-- ward in said stand, means to limit suchupward movement, and means independent of said adjusting means to varythe vertical position of said stand relatively to said work table, saidlatter means comprlsing a double wedge member slidable beneath saidstand. In testimony whereof I have hereunto affixed my signature.

WALTER H. HALL.

